Conversion tracking works by placing a small piece of JavaScript code on pages users reach after completing a valuable action. When someone fills out a contact form, makes a purchase, or calls your business, the tracking pixel fires and reports that event back to your advertising or analytics platform. Google Ads, Meta Ads, LinkedIn, and Google Analytics 4 all use this same fundamental mechanism. The technical setup has two parts. First, you define what counts as a conversion in your platform's interface—form submission, purchase, phone call, file download, time on site threshold. Second, you implement the tracking code. You can paste the pixel directly into your confirmation page HTML, install it via your CMS plugin, or deploy it through Google Tag Manager. GTM is the professional standard because you manage all tracking codes in one place and can add conversion events without touching your site code every time. For e-commerce, platforms like Shopify and WooCommerce have native integrations that automatically pass transaction data including revenue, product IDs, and order values. For lead generation, you typically track thank-you page views or use event listeners to fire when someone clicks submit on a form. Phone call tracking requires either dynamic number insertion services like CallRail or Google's built-in call conversion import if you manually log calls in a CRM. The biggest mistake is firing conversion tags on the wrong page. If your tracking code sits on the form page instead of the thank-you page, you'll count every visitor as a conversion. Test everything in preview mode before going live. At Ottawa SEO, we validate conversion tracking by completing test transactions and checking that data appears correctly in the platform within 24 hours. We also cross-reference conversion counts between Google Ads, GA4, and CRM systems monthly because discrepancies of 10–15% are normal due to ad blockers, cookie consent, and attribution windows, but anything beyond that signals a technical problem.